We have
designed an embedded optical tracking system that provides real-time motion
information for prospective head motion correction for MRI at 7T. This system
enables the acquisition of motion-corrected very high resolution in vivo
MR images of the human brain (0.4 mm isotropic 3D FLASH, 0.5 mm isotropic 2D
TSE). Uncorrected and corrected 3D FLASH images were acquired in four
volunteers. Quantitative analysis demonstrated that the image quality was
reliably improved by the motion correction.